Branch-type shearing-resisting connecting part and application of branch-type shearing-resisting connecting part in preparation of steel-concrete composite structure

Abstract

The invention discloses a branch-type shearing-resisting connecting part and application of the branch-type shearing-resisting connecting part in preparation of a steel-concrete composite structure. The branch-type shearing-resisting connecting part is based on the principle of bionics and comprises a main rod, a branch rod, a cylindrical head and an arc striking junction. The main rod is a circular section straight rod. The lower end of the main rod is welded to a steel structure through the arc striking junction. The upper part and / or the side surface of the main rod are / is connected with the lower end of the branch rod. The main rod and / or the upper end of the branch rod are / is connected with the cylindrical head. The diameters, geometrical sizes and connecting positions and the like ofthe main rod and the branch rod are determined according to structure stress. The branch-type shearing-resisting connecting part can effectively guarantee connection between steel and concrete, erection of steel bars is facilitated, and construction is convenient.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a branch type shear connector and its application in preparing a steel-concrete composite structure. Background technique [0002] The steel-concrete composite structure is a structure in which steel beams, connectors and reinforced concrete slabs are combined into a whole and work together. This structure combines some characteristics of steel structure and reinforced concrete structure, and has been widely used in bridge engineering. For example, the approach bridges of the Donghai Bridge, the approach bridge of the Shanghai Yangtze River Bridge, the 85m span approach bridge of the Hong Kong-Zhuhai-Macao Bridge, etc., the approach bridges of the deep-middle channel under design, and the approach bridges of the Dalian Bay Cross-sea Traffic Project have all proposed steel-concrete composite structure schemes . [0003] Steel-concrete composite structures ...

AI Technical Summary

Problems solved by technology

However, the rigidity of the perforated plate connector is very high, which is easy to cause a large stress concentration in the concrete structure, resulting in cracking of the concrete structure

The traditional welded stud connectors are less rigid, they have only one cylindrical head, and the connection between them and the concrete is weak, which leads to the cracking of the reinforced concrete slab, especially the steel-concrete composite continuous beam at the negative moment. Due to the large tensile stress of the bridge deck, cracking is very easy to occur in the area.

In addition, it is also because the traditional welding stud connector has only one cylindrical head, which cannot effectively fix the steel bars inside the reinforced concrete slab, and additional measures need to be taken for the positioning of the steel bars, resulting in frequent damage to the positioning of the steel bars during construction, and the ideal stress state cannot be achieved

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